Every hour of driving uses 3 gallons of gas. Use a table to find how many gallons of gas would be used if driving for 15 hours.

Step-by-step explanation:

Hour-Number of gallons:

1 - 3              

2 - 6

3 - 9

4 - 12

5 - 15

6 - 18

7 - 21

8 - 24

9 - 27

10 - 30

11 - 33

12 - 36

13 - 39

14 - 42

15 - 45

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2